Soda ash, the scientific name sodium carbonate, common name soda, stone alkali, alkali ash, alkali powder, washing alkali, chemical formula Na2CO3, is a salt, the appearance of soda ash is white powder and fine crystal, miso. Its aqueous solution is alkaline and has certain corrosive properties. It can neutralize with acid to form corresponding salt and release carbon dioxide. Soda ash is extremely hygroscopic, easily deliquescent in humid air, slowly absorbs carbon dioxide and water, and partially turns into sodium bicarbonate, so the packaging should be strict. Responsible for moisture absorption and agglomeration
1. Classification according to use: industrial grade soda ash and food grade soda ash.
2. According to different bulk density, industrial grade soda ash is divided into light soda ash and heavy soda ash.
3. According to the different content of sulfide, it is divided into common alkali and low salt alkali.
In "Industrial Sodium Carbonate Standard / GB-210.1-2004", ordinary base, low-salt base (by dry mass of NaCl mass fraction) /% are less than or equal to 0.70 and 0.30, respectively.
4, the production process: ammonia, alkali, trona
Sodium carbonate is one of the important chemical raw materials, widely used in light industrial and chemical, building materials, chemical industry, food industry, metallurgy, textile, petroleum, national defense, medicine and other fields. Among the industrial alkalis, mainly light industry, building materials, chemical industry, accounting for about 2/3. Secondly, metallurgy, textile, petroleum, national defense, medicine and other industries.
1. The glass industry is the largest consumer of soda ash, per ton of glass. Consumption of soda ash 0.2t.
Mainly used for float glass, tube glass bulb, optical glass, etc. Soda ash provides Na ions in the glass batch, acts as a clarifying agent to eliminate bubbles in the glass, and is decomposed by heat in the kiln to release CO2 gas to agitate the glass container!
2. It can also be used in other departments such as chemical metallurgy.
Industrial sodium carbonate will volatilize and generate gas when it meets high temperature. It can stir the metal liquid and use the shell of metallurgical calcium oxide to effectively remove sulfur. Use heavy soda ash technology to reduce alkali dust flying, reduce raw material consumption, improve working conditions, improve product quality, reduce alkali powder rust resistance and extend kiln life
3. As buffer and neutralizer , dough improver, can be used in pastry and pasta products, according to the needs of production
, there will be microbes forming acid in the process of baking, the dough will become sour after the initiation, must be neutralized with alkali to make delicious pasta
4, as a washing The agent is used for wool rinsing, bath salt and medicine, and alkali agent in tanning leather.
The soda solution is alkaline due to the hydrolysis, the alkali solution can react with the oil to form a high-acid sodium which is soluble in water.
5. The soda
ash in drilling can reduce the fluid loss of the new slurry, viscosity and shear force. Increase, but the excess soda ash will cause the clay particles to coagulate, which will damage the performance of the drilling fluid. The appropriate dosage should be determined by the pulping experiment. Also. When the cement plug or drilling fluid is subjected to calcium intrusion, adding a proper amount of soda ash to precipitate Ca2+ into CaCO3 can also make the performance of the drilling fluid better.
6. Special reagent for color TV (less
used now) 7. For the pharmaceutical industry, as an antacid , osmotic laxatives.
8. Anhydrous sodium carbonate is used for electrical and electrochemical degreasing, electroless copper plating, aluminum etching, electropolishing of chlorine and alloy, chemical oxidation of aluminum, sealing after phosphating, rust prevention between processes, electrolytic fading Chromium plating and chrome-plated oxide film are also used in pre-plated copper, plated, and iron-plated alloy electrolytes.
9. Used as a water softener in the printing and dyeing industry.
10. Used in the leather industry for degreasing of raw materials, neutralizing chromium. Tanning and increasing the alkalinity of chrome tanning liquid.
11. Light soda ash can be used as a filler for rubber.
12. Water treatment, softening water with lime soda ash. Lime is generally used to remove carbonate hardness in water. Soda ash is used to remove non-carbonate hardness.
13. Use practical soda ash. Production of hydroxymethyl cellulose
14, by-product soda ash for the production of sodium silicate,
sodium silicate, sodium silicate, petroleum silica (quartz sand), soda ash, (or soil alkali) eutectic in the melting kiln
15, cement mortar added The main role of soda ash is drought, and it is also to stimulate the mixed material slag. Otherwise it will cause the late strength of the mortar to be low!
